Syntax
js
createConvolver()
Parameters
None.
Return value
Examples
Creating a convolver node
The following example shows how to use an AudioContext to create a convolver node.
You create an AudioBuffer containing a sound sample to be used
as an ambience to shape the convolution (called the impulse response) and
apply that to the convolver. The example below uses a short sample of a concert hall
crowd, so the reverb effect applied is really deep and echoey.
For more complete applied examples/information, check out our Voice-change-O-matic demo (see app.js for the code that is excerpted below).
js
const audioCtx = new AudioContext();
// …
const convolver = audioCtx.createConvolver();
// …
// Grab audio track via fetch() for convolver node
try {
const response = await fetch(
"https://mdn.github.io/voice-change-o-matic/audio/concert-crowd.ogg",
);
const arrayBuffer = await response.arrayBuffer();
const decodedAudio = await audioCtx.decodeAudioData(arrayBuffer);
convolver.buffer = decodedAudio;
} catch (error) {
console.error(
`Unable to fetch the audio file: ${name} Error: ${err.message}`,
);
}
Specifications
| Specification |
|---|
| Web Audio API # dom-baseaudiocontext-createconvolver |